Which of the following proteins are globular proteins?
A. Insulin
B. Myosin
C. Keratin
D. Albumin
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → A and D only
Proteins are classified by their molecular shape as fibrous proteins (fibre-like, insoluble in water) or globular proteins (chains coiled into a spherical shape, usually soluble in water).
(A) Insulin — Correct. Insulin is a small water-soluble hormone with a compact, globular shape.
(B) Myosin — Incorrect. Myosin, found in muscles, is a fibrous protein.
(C) Keratin — Incorrect. Keratin, found in hair, wool and silk, is a fibrous protein.
(D) Albumin — Correct. Albumins, such as egg albumin and serum albumin, are water-soluble globular proteins.
NCERT (2026-27 edition):
Fibrous Proteins
Note: The same/similar question has been asked in different years by NTA as per the details given below:
| 2026 | 2025 | 2024 | 2023 | 2022 |
|---|---|---|---|---|
| 19-05 S2 | 13-05 S1 | – | – | – |